Say " 'audhu billah" (I seek refuge in Allah) and other dhikr (remembrance of Allah, swt) when the evil whisper of Shaitaan comes upon you, such as
when becoming angry,
having confusing or disobedient thoughts,
when approached by arrogants who dispute the Truth of the ayats of Allah, swt,
when about to recite Qur'an,
or when in any situation that Quran and Sunnah teaches you is a result of the shaitaan.
The Noble Qur'an - Fussilat 41:36
And if an evil whisper from Shait?n (Satan) tries to turn you away (O Muhammad SAW) (from doing good, etc.), then seek refuge in All?h. Verily, He is the All-Hearer, the All-Knower.
The Noble Qur'an - Al-A'raaf 7:200, 201
And if an evil whisper comes to you from Shait?n (Satan) then seek refuge with All?h. Verily, He is All-Hearer, All-Knower.
Verily, those who are Al-Muttaq?n (the pious - see V.2:2), when an evil thought comes to them from Shait?n (Satan), they remember (All?h), and (indeed) they then see (aright).
The Noble Qur'an - Ghaafir 40:56
Verily, those who dispute about the Ay?t (proofs, evidences, verses, lessons, signs, revelations, etc.) of All?h, without any authority having come to them, there is nothing else in their breasts except pride [to accept you (Muhammad SAW) as a of All?h and to obey you]. They will never have it (i.e. Prophethood which All?h has bestowed upon you). So seek refuge in All?h (O Muhammad SAW from the arrogants). Verily, it is He Who is the All-Hearer, the All-Seer.
The Noble Qur'an - An-Nahl 16:98
So when you want to recite the Qur'?n, seek refuge with All?h from Shait?n (Satan), the outcast (the cursed one).
Hadith - Al-Muwatta 51.10
Yahya related to me from Malik that Yahya ibn Said said, "When the of Allah was taken on the Night Journey, he saw an evil jinn seeking him with a torch of fire. Whenever the of Allah turned, he saw him. Jibril said to him, 'Shall I teach you some words to say? When you say them, his torch will be put out and will fall from him.' The of Allah said, 'Yes, indeed.' Jibril said, 'Say, 'I seek refuge with the Noble Face of Allah and with the complete words of Allah which neither the good person nor the corrupt can exceed, from the evil of what descends from the sky and the evil of what ascends in it, and from the evil of what is created in the earth and the evil of what comes out of it, and from the trials of the night and day, and from the visitations of the night and day, except for one that knocks with good, O Merciful!" "'
Audhu bi wajhi'llahi' l-karim wa bi kalimati'llahi't-tammati. Allati la yujawazu hunna barra wa la fajir, min sharri ma yanzil min as-sama, wa sharri ma yaruju fiha, wa sham ma dhara' fi'l-ard, wa sharri ma yakhruju minha, wa min fitani'l-layli wa'n-nahar, wa min tawariqi'l-layli wa'n-nahar illa tariqan yatruq bikhayr ya Rahman!
Say Bismillah and then the du'a below before entering the toilet area...
Hadith - Al-Tirmidhi 358, Narrated Ali ibn Abu Talib
Allah's said: The screen between the eyes of Jinn and the private parts of the sons of Adam as one of them enters the privy is that he should say: In the name of Allah. [This hadith has been transmitted by Tirmidhi and he said: It is a gharib hadith and its isnad is not sound.]
[Bismillahi] Allahumma inna 'audhu bika minal khubthi wal khabaa'ith.
[By the Name of Allah]. Oh Allah, I seek protection in You from unclean spirits, male and female. [Abu Dawud 4/264, Ahmad 2/389]
The ayat "Al-Kursi" (2:255) is well-known as a means for repelling mischievious jinn...
The Noble Qur'an - Al-Baqara 2:255
Allah! La ilaha illa Huwa (none has the right to be worshipped but He), the Ever, Living, the One Who sustains and protects all that exists. neither slumber, nor sleep overtake Him. To Him belongs whatever is in the heavens and whatever is on earth. Who is he that can intercede with Him except with His Permission? He knows what happens to them (His creatures) in this world, and what will happen to them in the Hereafter. And they will never compass anything of His Knowledge except that which He wills. His Kursi extends over the heavens and the earth, and He feels no fatigue in guarding and preserving them. And He is the Most High, the Most Great (Ayat-ul-Kursi).
Hadith - Tirmidhi 2173, Narrated Jubayr ibn Nufayr [Darimi transmitted it in mursal form].
Allah's said, "Allah finished Surat al-Baqarah with two verses which I have been given from His treasure which is under the Throne; so learn them and teach them to your womenfolk, for they are a blessing, a means of a approach (to Allah) and a supplication."
Ibn Taimiya, Majmu, vol. 19, p. 55
"The numerous people who have experienced these events all confirm the amazing effectiveness of this verse in warding off jinn and breaking their spells. It [editor's note: ayat al-Kursi] has a great effect in repelling devils from humans, from the possessed and from those picked out by jinn, such as wrongdoers, people with bad tempers, those who follow their desires and lusts, musicians and those who become ecstatic through whistling and clapping. If these verses are read over them with sincerity to Allah, the jinn will leave. It will put an end to the mirages created by the jinn. It will also disclose the falseness of those, the brothers of the jinn, who perform miraculous acts. The jinn inspire their devotees with some knowledge that the ignorant think are miracles that Allah grants His pious servants. In fact, they are simply Shaytaan's acts of deception over his devotees, of those whom have earned Allah's wrath and those who have gone astray."
Hadith - Tirmidhi 2145, Narrated An-Nu'man ibn Bashir
Allah's said, "Two thousand years before creating the heavens and the Earth, Allah inscribed a book of which He sent down two verses with which He concluded surat al-Baqarah. The Devil will not come near a house in which they are recited three nights." [Tirmidhi and Darimi transmitted it, Tirmidhi saying this is a gharib tradition.]
Make du'a (supplication) such as the following:
The Noble Qur'an - Al-Baqarah 2:286
All?h burdens not a person beyond his scope. He gets reward for that (good) which he has earned, and he is punished for that (evil) which he has earned. "Our Lord! Punish us not if we forget or fall into error, our Lord! Lay not on us a burden like that which You did lay on those before us (Jews and Christians); our Lord! Put not on us a burden greater than we have strength to bear. Pardon us and grant us Forgiveness. Have mercy on us. You are our Maul? (Patron, Supporter and Protector, etc.) and give us victory over the disbelieving people."
Recite Surahs Al-Falaq (Chapter 113) and An-Nas (Chapter 114)..
Hadith - Al-Tirmidhi 1019, Narrated Abu Sa'id al-Khudri
The Prophet used to seek protection against the Jinn and the evil eye till surahs al-Falaq and an-Nas were revealed. After they were revealed he stuck to them and discarded everything beside them. [Transmitted by Tirmidhi]
Hadith - Al-Tirmidhi 4563, Narrated Abu Sa'id al-Khudri
Allah's used to seek refuge in Allah from jinn and the evil eye in men till the Mu'awwidhatan came down, after which he made use of them and abandoned everything else. [Tirmidhi and Ibn Majah transmitted it, Tirmidhi saying this is a hasan gharib tradition

Say " 'audhu billah" (I seek refuge in Allah) and other dhikr (remembrance of Allah, swt) when the evil whisper of Shaitaan comes upon you, such as when becoming angry, having confusing or disobedient thoughts, when approached by arrogants who dispute the Truth of the ayats of Allah, swt, when about to recite Qur'an, or when in any situation that Quran and Sunnah teaches you is a result of the shaitaan. The Noble Qur'an - Fussilat 41:36 And if an evil whisper from Shait?n (Satan) tries to turn you away (O Muhammad SAW) (from doing good, etc.), then seek refuge in All?h. Verily, He is the All-Hearer, the All-Knower. The Noble Qur'an - Al-A'raaf 7:200, 201 And if an evil whisper comes to you from Shait?n (Satan) then seek refuge with All?h. Verily, He is All-Hearer, All-Knower. Verily, those who are Al-Muttaq?n (the pious - see V.2:2), when an evil thought comes to them from Shait?n (Satan), they remember (All?h), and (indeed) they then see (aright). The Noble Qur'an - Ghaafir 40:56 Verily, those who dispute about the Ay?t (proofs, evidences, verses, lessons, signs, revelations, etc.) of All?h, without any authority having come to them, there is nothing else in their breasts except pride [to accept you (Muhammad SAW) as a of All?h and to obey you]. They will never have it (i.e. Prophethood which All?h has bestowed upon you). So seek refuge in All?h (O Muhammad SAW from the arrogants). Verily, it is He Who is the All-Hearer, the All-Seer. The Noble Qur'an - An-Nahl 16:98 So when you want to recite the Qur'?n, seek refuge with All?h from Shait?n (Satan), the outcast (the cursed one). Hadith - Al-Muwatta 51.10 Yahya related to me from Malik that Yahya ibn Said said, "When the of Allah was taken on the Night Journey, he saw an evil jinn seeking him with a torch of fire. Whenever the of Allah turned, he saw him. Jibril said to him, 'Shall I teach you some words to say? When you say them, his torch will be put out and will fall from him.' The of Allah said, 'Yes, indeed.' Jibril said, 'Say, 'I seek refuge with the Noble Face of Allah and with the complete words of Allah which neither the good person nor the corrupt can exceed, from the evil of what descends from the sky and the evil of what ascends in it, and from the evil of what is created in the earth and the evil of what comes out of it, and from the trials of the night and day, and from the visitations of the night and day, except for one that knocks with good, O Merciful!" "' Audhu bi wajhi'llahi' l-karim wa bi kalimati'llahi't-tammati. Allati la yujawazu hunna barra wa la fajir, min sharri ma yanzil min as-sama, wa sharri ma yaruju fiha, wa sham ma dhara' fi'l-ard, wa sharri ma yakhruju minha, wa min fitani'l-layli wa'n-nahar, wa min tawariqi'l-layli wa'n-nahar illa tariqan yatruq bikhayr ya Rahman! Say Bismillah and then the du'a below before entering the toilet area... Hadith - Al-Tirmidhi 358, Narrated Ali ibn Abu Talib Allah's said: The screen between the eyes of Jinn and the private parts of the sons of Adam as one of them enters the privy is that he should say: In the name of Allah. [This hadith has been transmitted by Tirmidhi and he said: It is a gharib hadith and its isnad is not sound.] [Bismillahi] Allahumma inna 'audhu bika minal khubthi wal khabaa'ith. [By the Name of Allah]. Oh Allah, I seek protection in You from unclean spirits, male and female. [Abu Dawud 4/264, Ahmad 2/389] The ayat "Al-Kursi" (2:255) is well-known as a means for repelling mischievious jinn... The Noble Qur'an - Al-Baqara 2:255 Allah! La ilaha illa Huwa (none has the right to be worshipped but He), the Ever, Living, the One Who sustains and protects all that exists. neither slumber, nor sleep overtake Him. To Him belongs whatever is in the heavens and whatever is on earth. Who is he that can intercede with Him except with His Permission? He knows what happens to them (His creatures) in this world, and what will happen to them in the Hereafter. And they will never compass anything of His Knowledge except that which He wills. His Kursi extends over the heavens and the earth, and He feels no fatigue in guarding and preserving them. And He is the Most High, the Most Great (Ayat-ul-Kursi). Hadith - Tirmidhi 2173, Narrated Jubayr ibn Nufayr [Darimi transmitted it in mursal form]. Allah's said, "Allah finished Surat al-Baqarah with two verses which I have been given from His treasure which is under the Throne; so learn them and teach them to your womenfolk, for they are a blessing, a means of a approach (to Allah) and a supplication." Ibn Taimiya, Majmu, vol. 19, p. 55 "The numerous people who have experienced these events all confirm the amazing effectiveness of this verse in warding off jinn and breaking their spells. It [editor's note: ayat al-Kursi] has a great effect in repelling devils from humans, from the possessed and from those picked out by jinn, such as wrongdoers, people with bad tempers, those who follow their desires and lusts, musicians and those who become ecstatic through whistling and clapping. If these verses are read over them with sincerity to Allah, the jinn will leave. It will put an end to the mirages created by the jinn. It will also disclose the falseness of those, the brothers of the jinn, who perform miraculous acts. The jinn inspire their devotees with some knowledge that the ignorant think are miracles that Allah grants His pious servants. In fact, they are simply Shaytaan's acts of deception over his devotees, of those whom have earned Allah's wrath and those who have gone astray." Hadith - Tirmidhi 2145, Narrated An-Nu'man ibn Bashir Allah's said, "Two thousand years before creating the heavens and the Earth, Allah inscribed a book of which He sent down two verses with which He concluded surat al-Baqarah. The Devil will not come near a house in which they are recited three nights." [Tirmidhi and Darimi transmitted it, Tirmidhi saying this is a gharib tradition.] Make du'a (supplication) such as the following: The Noble Qur'an - Al-Baqarah 2:286 All?h burdens not a person beyond his scope. He gets reward for that (good) which he has earned, and he is punished for that (evil) which he has earned. "Our Lord! Punish us not if we forget or fall into error, our Lord! Lay not on us a burden like that which You did lay on those before us (Jews and Christians); our Lord! Put not on us a burden greater than we have strength to bear. Pardon us and grant us Forgiveness. Have mercy on us. You are our Maul? (Patron, Supporter and Protector, etc.) and give us victory over the disbelieving people." Recite Surahs Al-Falaq (Chapter 113) and An-Nas (Chapter 114).. Hadith - Al-Tirmidhi 1019, Narrated Abu Sa'id al-Khudri The Prophet used to seek protection against the Jinn and the evil eye till surahs al-Falaq and an-Nas were revealed. After they were revealed he stuck to them and discarded everything beside them. [Transmitted by Tirmidhi] Hadith - Al-Tirmidhi 4563, Narrated Abu Sa'id al-Khudri Allah's used to seek refuge in Allah from jinn and the evil eye in men till the Mu'awwidhatan came down, after which he made use of them and abandoned everything else. [Tirmidhi and Ibn Majah transmitted it, Tirmidhi saying this is a hasan gharib tradition